| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide irradiation controlled to a diamond material in order to minimize the variation of an absorption properties, which may occur when a certain type nitrogen containing diamond material is exposed to a specific condition.SOLUTION: The diamond material showing a difference between absorption properties after exposure to a radiation (typically a UV ray) having an energy of at least 5.5 eV and heat treatment at 525°C(798K) is prepared and is subjected to irradiation controlled so as to introduce defects in the diamond material. After the controlled irradiation, the difference between the absorption properties is reduced after the exposure to a radiation having an energy of at least 5.5 eV and the heat treatment at 525°C (798K). A diamond material having absorption properties showing the properties of isolated holes is also disclosed.</p> |
